Question

Pyramid of energy is always upright. This is in accordance with the law of

• A. Thermodynamics
• B. Tolerance
• C. Limiting factors
• D. Evolution

Answer 1

The correct option is A Thermodynamics

Flow of energy declines as it passes from lower to higher trophic level. This is explained by second law of thermodynamics. According to this law, the energy decreases from one trophic level to the next trophic level because energy is lost as metabolic heat during transfer of energy. When food energy passes from producers to herbivores to carnivores, only 10% of energy is transferred from one trophic level to another trophic level. Hence, the pyramid of energy is always upright.

Thus, the correct answer is option A.